> I don’t understand? Why not make the memory representation sympathetic with the operations you’re going to do on it?
There's no reason to, as there's no reason not to. It's basically irrelevant.
If carrier passing is so important, why can't you just mirror your transistors and operate on the same wires, but on the opposite order? Well, you can, and it's trivial. (And, by the way, carrier passing isn't important. High performances ALU pass carrier only though blocks, that can appear anywhere. And the wiring of those isn't even planar, so how you arrange them isn't a showstopper.)
There's no reason to, as there's no reason not to. It's basically irrelevant.
If carrier passing is so important, why can't you just mirror your transistors and operate on the same wires, but on the opposite order? Well, you can, and it's trivial. (And, by the way, carrier passing isn't important. High performances ALU pass carrier only though blocks, that can appear anywhere. And the wiring of those isn't even planar, so how you arrange them isn't a showstopper.)